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[129.46.96.20]) by smtp.gmail.com with ESMTPSA id 46e09a7af769-7d59785d8d5sm9311790a34.17.2026.03.03.03.30.34 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 03 Mar 2026 03:30:36 -0800 (PST) From: Yuvraj Sakshith To: mst@redhat.com, david@kernel.org Cc: kys@microsoft.com, haiyangz@microsoft.com, wei.liu@kernel.org, decui@microsoft.com, longli@microsoft.com, jasowang@redhat.com, xuanzhuo@linux.alibaba.com, eperezma@redhat.com, akpm@linux-foundation.org, lorenzo.stoakes@oracle.com, Liam.Howlett@oracle.com, vbabka@suse.cz, rppt@kernel.org, surenb@google.com, mhocko@suse.com, jackmanb@google.com, hannes@cmpxchg.org, ziy@nvidia.com, linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org, virtualization@lists.linux.dev, linux-mm@kvack.org Subject: [PATCH v4 1/5] mm/page_reporting: add PAGE_REPORTING_ORDER_UNSPECIFIED Date: Tue, 3 Mar 2026 03:30:28 -0800 Message-Id: <20260303113032.3008371-2-yuvraj.sakshith@oss.qualcomm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260303113032.3008371-1-yuvraj.sakshith@oss.qualcomm.com> References: <20260303113032.3008371-1-yuvraj.sakshith@oss.qualcomm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMzAzMDA4OSBTYWx0ZWRfX/FCtTxr/icfQ NRs0/95FZZrgaLBNvpex08iiBDkq6LY4m/DT+jkfQDYvYt6SR3y72l8cANui+e0BXDl28ie6JNN IUlc4axn8P8t5rS5EYZDKJDZpwe4Qg9QrkPXp8GxjTNO2KKYrMG3mTUWgV3mIoG6Cz/WifsCozF NKsPd3hyJD4/+wqHQJ9BC+vQEI7r4o8LYHXoQZxzER9QG4nznlXJ6dLk9ovccBcgLr3YdL1pnXu dJEn8nxpyPLvVMAWXTXB8sV666P/fBGF8NFYcbUMyrDlf3LGhHJL/JlpVG6TWDTsK6GAesO1i73 waXKbovFYSD7LkJOIp2++9MsozBFYLf58HoNoa1+CVLGw2+GUTL36sAHlc2xZNr4vBTj95FMxuA 5rKrJlMlE8WB+pWP+ex15gjGOxYGlLx34CUROv7K/vQSo0MoukIHl/hEh4O92VFbyjWQeVKgjgv 3JGFK14Jaz/4RRmWQ2w== X-Proofpoint-ORIG-GUID: kOR55jekdg5pwPIf6AQ_TleXSWsSlFya X-Authority-Analysis: v=2.4 cv=S+HUAYsP c=1 sm=1 tr=0 ts=69a6c65d cx=c_pps a=+3WqYijBVYhDct2f5Fivkw==:117 a=ouPCqIW2jiPt+lZRy3xVPw==:17 a=Yq5XynenixoA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=3WHJM1ZQz_JShphwDgj5:22 a=EUspDBNiAAAA:8 a=agIWOxjPXKrzBStnBTYA:9 a=eYe2g0i6gJ5uXG_o6N4q:22 X-Proofpoint-GUID: kOR55jekdg5pwPIf6AQ_TleXSWsSlFya X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-03-02_05,2026-03-03_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 malwarescore=0 lowpriorityscore=0 bulkscore=0 suspectscore=0 clxscore=1015 spamscore=0 priorityscore=1501 adultscore=0 impostorscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2602130000 definitions=main-2603030089 Content-Type: text/plain; charset="utf-8" Drivers can pass order of pages to be reported while registering itself. Today, this is a magic number, 0. Label this with PAGE_REPORTING_ORDER_UNSPECIFIED and check for it when the driver is being registered. This macro will be used in relevant drivers next. Signed-off-by: Yuvraj Sakshith Acked-by: David Hildenbrand (Arm) Acked-by: Michael S. Tsirkin --- include/linux/page_reporting.h | 1 + mm/page_reporting.c | 3 ++- 2 files changed, 3 insertions(+), 1 deletion(-) diff --git a/include/linux/page_reporting.h b/include/linux/page_reporting.h index fe648dfa3..d1886c657 100644 --- a/include/linux/page_reporting.h +++ b/include/linux/page_reporting.h @@ -7,6 +7,7 @@ =20 /* This value should always be a power of 2, see page_reporting_cycle() */ #define PAGE_REPORTING_CAPACITY 32 +#define PAGE_REPORTING_ORDER_UNSPECIFIED 0 =20 struct page_reporting_dev_info { /* function that alters pages to make them "reported" */ diff --git a/mm/page_reporting.c b/mm/page_reporting.c index e4c428e61..a97ee07cb 100644 --- a/mm/page_reporting.c +++ b/mm/page_reporting.c @@ -370,7 +370,8 @@ int page_reporting_register(struct page_reporting_dev_i= nfo *prdev) */ =20 if (page_reporting_order =3D=3D -1) { - if (prdev->order > 0 && prdev->order <=3D MAX_PAGE_ORDER) + if (prdev->order !=3D PAGE_REPORTING_ORDER_UNSPECIFIED && + prdev->order <=3D MAX_PAGE_ORDER) page_reporting_order =3D prdev->order; 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[129.46.96.20]) by smtp.gmail.com with ESMTPSA id 46e09a7af769-7d59785d8d5sm9311790a34.17.2026.03.03.03.30.36 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 03 Mar 2026 03:30:37 -0800 (PST) From: Yuvraj Sakshith To: mst@redhat.com, david@kernel.org Cc: kys@microsoft.com, haiyangz@microsoft.com, wei.liu@kernel.org, decui@microsoft.com, longli@microsoft.com, jasowang@redhat.com, xuanzhuo@linux.alibaba.com, eperezma@redhat.com, akpm@linux-foundation.org, lorenzo.stoakes@oracle.com, Liam.Howlett@oracle.com, vbabka@suse.cz, rppt@kernel.org, surenb@google.com, mhocko@suse.com, jackmanb@google.com, hannes@cmpxchg.org, ziy@nvidia.com, linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org, virtualization@lists.linux.dev, linux-mm@kvack.org Subject: [PATCH v4 2/5] virtio_balloon: set unspecified page reporting order Date: Tue, 3 Mar 2026 03:30:29 -0800 Message-Id: <20260303113032.3008371-3-yuvraj.sakshith@oss.qualcomm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260303113032.3008371-1-yuvraj.sakshith@oss.qualcomm.com> References: <20260303113032.3008371-1-yuvraj.sakshith@oss.qualcomm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Authority-Analysis: v=2.4 cv=Br+QAIX5 c=1 sm=1 tr=0 ts=69a6c65f cx=c_pps a=AKZTfHrQPB8q3CcvmcIuDA==:117 a=ouPCqIW2jiPt+lZRy3xVPw==:17 a=Yq5XynenixoA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=_glEPmIy2e8OvE2BGh3C:22 a=VwQbUJbxAAAA:8 a=EUspDBNiAAAA:8 a=Jvdq4yWlxvBRgq3Xg-wA:9 a=pF_qn-MSjDawc0seGVz6:22 X-Proofpoint-ORIG-GUID: U-EJAEJWemKJSnB-vK85bldt0QWtxy9y X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMzAzMDA4OSBTYWx0ZWRfXwbdIgdphBxv8 e6BdDvrCiIiBUglOgGgyVWRLANYbdkYeBRPNpPA/nOoH2wWl3k3aNgOckj9IH/qiaL9OsLLo4jm RZ4GgGmZNYewf5XUg/HhE+dlTVpnyADAJYHozfxoMJsR15GHZxdsEfNRPH8n2kYFeqdrwNiUWEE 0PFcCmQXTG4Ar4z1gOb5IP9FVUKc0b2DXp3WYr//N7iZWF1JB/sEYTeHB8Y4Oa6pt8jYhjmax8l jbN4+O7rwcGxaezoZZ5sL725JtXc//J2DbtG1Xt9kFbiw/V5KZXTibArAQGcUiB6gO3Bqp09OT5 Beti7yzMjb88DHqlurQ1WzbOCdAQY3NH65yQe0LnWTtRRGcy/ZB2B/joTyzi+5HWKygJqYZBl9G 0MQf1PONfHWTVDm6rsuLNvZGTs4Jl+2GZBIQmdOgsHgzqTQ+5vkyaqcGpqKUPC60I91yjH7NuIT n300oxiLCFJif6GpW4Q== X-Proofpoint-GUID: U-EJAEJWemKJSnB-vK85bldt0QWtxy9y X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-03-02_05,2026-03-03_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 malwarescore=0 clxscore=1015 bulkscore=0 spamscore=0 priorityscore=1501 adultscore=0 lowpriorityscore=0 suspectscore=0 impostorscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2602130000 definitions=main-2603030089 Content-Type: text/plain; charset="utf-8" virtio_balloon page reporting order is set to MAX_PAGE_ORDER implicitly as vb->prdev.order is never initialised and is auto-set to zero. Explicitly mention usage of default page order by making use of PAGE_REPORTING_ORDER_UNSPECIFIED fallback value. Acked-by: David Hildenbrand (Arm) Signed-off-by: Yuvraj Sakshith Acked-by: Michael S. Tsirkin --- drivers/virtio/virtio_balloon.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloo= n.c index 74fe59f5a..2dfe2bcd8 100644 --- a/drivers/virtio/virtio_balloon.c +++ b/drivers/virtio/virtio_balloon.c @@ -1044,6 +1044,8 @@ static int virtballoon_probe(struct virtio_device *vd= ev) goto out_unregister_oom; } =20 + vb->pr_dev_info.order =3D PAGE_REPORTING_ORDER_UNSPECIFIED; + /* * The default page reporting order is @pageblock_order, which * corresponds to 512MB in size on ARM64 when 64KB base page --=20 2.34.1 From nobody Tue Apr 7 18:48:23 2026 Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0F8AA4266B1 for ; Tue, 3 Mar 2026 11:30:41 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=205.220.180.131 ARC-Seal: i=1; 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[129.46.96.20]) by smtp.gmail.com with ESMTPSA id 46e09a7af769-7d59785d8d5sm9311790a34.17.2026.03.03.03.30.38 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 03 Mar 2026 03:30:39 -0800 (PST) From: Yuvraj Sakshith To: mst@redhat.com, david@kernel.org Cc: kys@microsoft.com, haiyangz@microsoft.com, wei.liu@kernel.org, decui@microsoft.com, longli@microsoft.com, jasowang@redhat.com, xuanzhuo@linux.alibaba.com, eperezma@redhat.com, akpm@linux-foundation.org, lorenzo.stoakes@oracle.com, Liam.Howlett@oracle.com, vbabka@suse.cz, rppt@kernel.org, surenb@google.com, mhocko@suse.com, jackmanb@google.com, hannes@cmpxchg.org, ziy@nvidia.com, linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org, virtualization@lists.linux.dev, linux-mm@kvack.org Subject: [PATCH v4 3/5] hv_balloon: set unspecified page reporting order Date: Tue, 3 Mar 2026 03:30:30 -0800 Message-Id: <20260303113032.3008371-4-yuvraj.sakshith@oss.qualcomm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260303113032.3008371-1-yuvraj.sakshith@oss.qualcomm.com> References: <20260303113032.3008371-1-yuvraj.sakshith@oss.qualcomm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMzAzMDA4OSBTYWx0ZWRfX/DuyTZZhFP2M 4TuDqcoPoSPGv1gHZvwOxMzlWEx6GUar7xOhx+SVS3zNM3ILhkB0+eixqjwBS2+If0A9bQQENJH Z22cBN/ih4plaUYnRI/slSbHAmpJIg6eJEzA5VXMRM2VQbHsXPbERo8p2JtIhzKyy1T20g50zg3 hN1ud11viEcjwNbXsc4UwHfMMz/p9LjtOn6DjoQihVly7jdtPFNFgPwepELLMnl2SkxBoq5cHYc qHyXf9WrLHxJPGKJlsXVFia9nzvCj7uVZSYlliAXdmmh4NMsHOHjJ22bsvxqULfpdiJ9qpPcly2 /aY0r2rlH7Avv21CAQz47Ob23JFMxq9kQhW2NQbbvtRAHBoc+1TrIXB4H5c+aF2tbJ7BIHnCz23 h+WhG6tMjLD3NwysN0vN5EaNnFna9t7KbvbdYS/AueQui9R9MvDoPoAUgyGB0jM5tfan0iW65y+ CXLNB1kGQuIzEurojjA== X-Authority-Analysis: v=2.4 cv=T9CBjvKQ c=1 sm=1 tr=0 ts=69a6c660 cx=c_pps a=z9lCQkyTxNhZyzAvolXo/A==:117 a=ouPCqIW2jiPt+lZRy3xVPw==:17 a=Yq5XynenixoA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=ZpdpYltYx_vBUK5n70dp:22 a=VwQbUJbxAAAA:8 a=EUspDBNiAAAA:8 a=yAl3Rinrq36N4FMOn3wA:9 a=EyFUmsFV_t8cxB2kMr4A:22 X-Proofpoint-GUID: p-T6ei-9tmGJHc7VddvG_8GND_FLHBAV X-Proofpoint-ORIG-GUID: p-T6ei-9tmGJHc7VddvG_8GND_FLHBAV X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-03-02_05,2026-03-03_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 adultscore=0 spamscore=0 lowpriorityscore=0 bulkscore=0 priorityscore=1501 clxscore=1015 suspectscore=0 malwarescore=0 impostorscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2602130000 definitions=main-2603030089 Content-Type: text/plain; charset="utf-8" Explicitly mention page reporting order to be set to default value using PAGE_REPORTING_ORDER_UNSPECIFIED fallback value. Acked-by: David Hildenbrand (Arm) Signed-off-by: Yuvraj Sakshith Acked-by: Michael S. Tsirkin --- drivers/hv/hv_balloon.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/hv/hv_balloon.c b/drivers/hv/hv_balloon.c index 2b4080e51..09da68101 100644 --- a/drivers/hv/hv_balloon.c +++ b/drivers/hv/hv_balloon.c @@ -1663,7 +1663,7 @@ static void enable_page_reporting(void) * We let the page_reporting_order parameter decide the order * in the page_reporting code */ - dm_device.pr_dev_info.order =3D 0; + dm_device.pr_dev_info.order =3D PAGE_REPORTING_ORDER_UNSPECIFIED; ret =3D page_reporting_register(&dm_device.pr_dev_info); if (ret < 0) { dm_device.pr_dev_info.report =3D NULL; --=20 2.34.1 From nobody Tue Apr 7 18:48:23 2026 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 96A144301CA for ; Tue, 3 Mar 2026 11:30:43 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; 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[129.46.96.20]) by smtp.gmail.com with ESMTPSA id 46e09a7af769-7d59785d8d5sm9311790a34.17.2026.03.03.03.30.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 03 Mar 2026 03:30:41 -0800 (PST) From: Yuvraj Sakshith To: mst@redhat.com, david@kernel.org Cc: kys@microsoft.com, haiyangz@microsoft.com, wei.liu@kernel.org, decui@microsoft.com, longli@microsoft.com, jasowang@redhat.com, xuanzhuo@linux.alibaba.com, eperezma@redhat.com, akpm@linux-foundation.org, lorenzo.stoakes@oracle.com, Liam.Howlett@oracle.com, vbabka@suse.cz, rppt@kernel.org, surenb@google.com, mhocko@suse.com, jackmanb@google.com, hannes@cmpxchg.org, ziy@nvidia.com, linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org, virtualization@lists.linux.dev, linux-mm@kvack.org Subject: [PATCH v4 4/5] mm/page_reporting: change PAGE_REPORTING_ORDER_UNSPECIFIED to -1 Date: Tue, 3 Mar 2026 03:30:31 -0800 Message-Id: <20260303113032.3008371-5-yuvraj.sakshith@oss.qualcomm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260303113032.3008371-1-yuvraj.sakshith@oss.qualcomm.com> References: <20260303113032.3008371-1-yuvraj.sakshith@oss.qualcomm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMzAzMDA4OSBTYWx0ZWRfX61tvof/Ey/kd dlaPg4QoqgN0s0Xp1RQ4HNxO82h7n1tCiPeAZMIBhCghBV2E55R5+UGr0zHT3raFaVyRxWblA7S iakRx0iwkpNMAi20lPMZUm9HLZc/zrIu4jFdA42AJd8ddaVyR0t5vl2WO3sHfnV8M5hgNkmLdC9 XIJs8QDOCE29XezXuEgzyqtjaUgcJoB5L2iTIjHUGxjhpZz2NRBig2Im5djTPqfPFf90TPveC7K 9FlcyOTEtYI2hUCrtdLQhZuY+7QRJyklp3lEypDOFLtmyA3yx+9bMEywySTPA03JEVVOPk501+O C/N7XMeut/14KK52hFeh+HlKKQmdyhrA5rzZJwBLIHMdzrSXfLJEMEipMg6AjGcn8HenaCtaW9E 8g+3C/zi4AhW39iA8zZ8ol+9lNPZbZYHyOUNhTe1duU+3k8pv2uVzo+3vruo2r0mP5SjfgdyBNP QAkTWYmdLySHSbU+Gsw== X-Authority-Analysis: v=2.4 cv=MuhfKmae c=1 sm=1 tr=0 ts=69a6c662 cx=c_pps a=4ztaESFFfuz8Af0l9swBwA==:117 a=ouPCqIW2jiPt+lZRy3xVPw==:17 a=Yq5XynenixoA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=_K5XuSEh1TEqbUxoQ0s3:22 a=VwQbUJbxAAAA:8 a=EUspDBNiAAAA:8 a=c6WgzpUFESAvjm-ZtrYA:9 a=TPnrazJqx2CeVZ-ItzZ-:22 X-Proofpoint-ORIG-GUID: zi22LqL0j30gOP470nJzfvThkdJsee3T X-Proofpoint-GUID: zi22LqL0j30gOP470nJzfvThkdJsee3T X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-03-02_05,2026-03-03_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 phishscore=0 bulkscore=0 lowpriorityscore=0 adultscore=0 impostorscore=0 suspectscore=0 malwarescore=0 clxscore=1015 spamscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2602130000 definitions=main-2603030089 Content-Type: text/plain; charset="utf-8" PAGE_REPORTING_ORDER_UNSPECIFIED is now set to zero. This means, pages of order zero cannot be reported to a client/driver -- as zero is used to signal a fallback to MAX_PAGE_ORDER. Change PAGE_REPORTING_ORDER_UNSPECIFIED to (-1), so that zero can be used as a valid order with which pages can be reported. Acked-by: David Hildenbrand (Arm) Signed-off-by: Yuvraj Sakshith Acked-by: Michael S. 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[129.46.96.20]) by smtp.gmail.com with ESMTPSA id 46e09a7af769-7d59785d8d5sm9311790a34.17.2026.03.03.03.30.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 03 Mar 2026 03:30:42 -0800 (PST) From: Yuvraj Sakshith To: mst@redhat.com, david@kernel.org Cc: kys@microsoft.com, haiyangz@microsoft.com, wei.liu@kernel.org, decui@microsoft.com, longli@microsoft.com, jasowang@redhat.com, xuanzhuo@linux.alibaba.com, eperezma@redhat.com, akpm@linux-foundation.org, lorenzo.stoakes@oracle.com, Liam.Howlett@oracle.com, vbabka@suse.cz, rppt@kernel.org, surenb@google.com, mhocko@suse.com, jackmanb@google.com, hannes@cmpxchg.org, ziy@nvidia.com, linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org, virtualization@lists.linux.dev, linux-mm@kvack.org Subject: [PATCH v4 5/5] mm/page_reporting: change page_reporting_order to PAGE_REPORTING_ORDER_UNSPECIFIED Date: Tue, 3 Mar 2026 03:30:32 -0800 Message-Id: <20260303113032.3008371-6-yuvraj.sakshith@oss.qualcomm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260303113032.3008371-1-yuvraj.sakshith@oss.qualcomm.com> References: <20260303113032.3008371-1-yuvraj.sakshith@oss.qualcomm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Authority-Analysis: v=2.4 cv=Pv2ergM3 c=1 sm=1 tr=0 ts=69a6c664 cx=c_pps a=z9lCQkyTxNhZyzAvolXo/A==:117 a=ouPCqIW2jiPt+lZRy3xVPw==:17 a=Yq5XynenixoA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=DJpcGTmdVt4CTyJn9g5Z:22 a=EUspDBNiAAAA:8 a=xOnWzZm5OySgNDGUUPUA:9 a=EyFUmsFV_t8cxB2kMr4A:22 X-Proofpoint-ORIG-GUID: OMK0nOttUcB7dzPO7yx4TPLtRfUtuPae X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMzAzMDA4OSBTYWx0ZWRfXzehaOl5by4Zq I+I4sMYPSPBfMy8hWYfuBquZuheVDAwFxSPtgK0Tvr11kZAE+W03I+wbP/nh3soFvzq3gWuiHbx HEQ9pmjU53oBMVkRdhk/UrIAmgrVgcxX/H+sLGt3dLOPE25Lj+Hnbnh2PfVumCA7RcDE8w7R+Vj pR8pv8XfCpYvUtgniXRbxSiAsrpws3emlZXqnGpRkQL1wy/dyKCb9ECXILfpR1KBpntXJu8+TgA x3eOGcw978vIdClVM6+RCAuyem9Re8d95ti5BTsoL+jnGLk42BDl+u4rU5iRN1mm71jO6s4xpN3 JH7JEyl8JDrb0oYPu7vR4zxz8EWgHe2M570U5HFUt6Laqje0e+BF9V85UqLq34mIld1FRFh1PtM VN/aL7APrJcd077WJYvCEqGCFGTKRo1rcThHXlQkiISfyrUPhuL5Tw+M+NYhZ3VhU0Goh5b7zgR xdA6DTcA2KSki2Moi9Q== X-Proofpoint-GUID: OMK0nOttUcB7dzPO7yx4TPLtRfUtuPae X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-03-02_05,2026-03-03_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 lowpriorityscore=0 impostorscore=0 malwarescore=0 spamscore=0 suspectscore=0 adultscore=0 priorityscore=1501 phishscore=0 bulkscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2602130000 definitions=main-2603030089 Content-Type: text/plain; charset="utf-8" page_reporting_order when uninitialised, holds a magic number -1. Since we now maintain PAGE_REPORTING_ORDER_UNSPECIFIED as -1, which is also a flag, set page_reporting_order to this flag. Signed-off-by: Yuvraj Sakshith Acked-by: Michael S. Tsirkin --- mm/page_reporting.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/mm/page_reporting.c b/mm/page_reporting.c index a97ee07cb..21c11b75e 100644 --- a/mm/page_reporting.c +++ b/mm/page_reporting.c @@ -12,7 +12,7 @@ #include "internal.h" =20 /* Initialize to an unsupported value */ -unsigned int page_reporting_order =3D -1; +unsigned int page_reporting_order =3D PAGE_REPORTING_ORDER_UNSPECIFIED; =20 static int page_order_update_notify(const char *val, const struct kernel_p= aram *kp) { @@ -369,7 +369,7 @@ int page_reporting_register(struct page_reporting_dev_i= nfo *prdev) * pageblock_order. */ =20 - if (page_reporting_order =3D=3D -1) { + if (page_reporting_order =3D=3D PAGE_REPORTING_ORDER_UNSPECIFIED) { if (prdev->order !=3D PAGE_REPORTING_ORDER_UNSPECIFIED && prdev->order <=3D MAX_PAGE_ORDER) page_reporting_order =3D prdev->order; --=20 2.34.1